<template>
  <!-- #1d458d -->
  <div class="sidebar">
    
    <el-menu
      class="sidebar-el-menu"
      :collapse="collapse"
      background-color="#173771"
      unique-opened
      router
    >
      <template v-for="item in MenuTreeData">
        <template v-if="item.subs">
          <el-submenu :index="item.index" :key="item.index">
            <template slot="title">
              <!-- <i :class="item.icon"></i> -->
              <img :src="item.img" alt="" />&nbsp;
              <span slot="title">{{ item.title }}</span>
            </template>
            <template v-for="subItem in item.subs">
              <el-submenu
                v-if="subItem.subs"
                :index="subItem.index"
                :key="subItem.index"
              >
                <template slot="title">{{ subItem.title }}</template>
                <el-menu-item
                  v-for="(threeItem, i) in subItem.subs"
                  :key="i"
                  :index="threeItem.index"
                >
                  {{ threeItem.title }}
                </el-menu-item>
              </el-submenu>
              <el-menu-item v-else :index="subItem.index" :key="subItem.index">
                {{ subItem.title }}
              </el-menu-item>
            </template>
          </el-submenu>
        </template>
        <template v-else>
          <el-menu-item :index="item.index" :key="item.index">
            <!-- <i :class="item.icon"></i> -->
            <img :src="item.img" alt="" /> &nbsp;
            <span slot="title">{{ item.title }}</span>
          </el-menu-item>
        </template>
      </template>
    </el-menu>
  </div>
</template>

<script>
// import bus from '../common/bus';
export default {
  data() {
    return {
      collapse: false,
      items: this.MenuTreeData,
      example: [
        {
          icon: "el-icon-lx-home",
          index: "dashboard",
          title: "系统首页"
        },
        {
          icon: "el-icon-lx-cascades",
          index: "table",
          title: "基础表格"
        },
        {
          icon: "el-icon-lx-copy",
          index: "tabs",
          title: "tab选项卡"
        },
        {
          icon: "el-icon-lx-calendar",
          index: "3",
          title: "表单相关",
          subs: [
            {
              index: "form",
              title: "基本表单"
            },
            {
              index: "3-2",
              title: "三级菜单",
              subs: [
                {
                  index: "editor",
                  title: "富文本编辑器"
                },
                {
                  index: "markdowna",
                  title: "markdowna编辑器"
                }
              ]
            },
            {
              index: "upload",
              title: "文件上传"
            }
          ]
        },
        {
          icon: "el-icon-lx-emoji",
          index: "icon",
          title: "自定义图标"
        },
        {
          icon: "el-icon-pie-chart",
          index: "charts",
          title: "schart图表"
        },
        {
          icon: "el-icon-rank",
          index: "6",
          title: "拖拽组件",
          subs: [
            {
              index: "drag",
              title: "拖拽列表"
            },
            {
              index: "dialog",
              title: "拖拽弹框"
            }
          ]
        },
        {
          icon: "el-icon-lx-global",
          index: "i18n",
          title: "国际化功能"
        },
        {
          icon: "el-icon-lx-warn",
          index: "7",
          title: "错误处理",
          subs: [
            {
              index: "permission",
              title: "权限测试"
            },
            {
              index: "404",
              title: "404页面"
            }
          ]
        },
        {
          icon: "el-icon-lx-redpacket_fill",
          index: "/donate",
          title: "支持作者"
        }
      ]
    };
  },
  computed: {
    onRoutes() {
      return this.$route.path.replace("/", "");
    }
  },
  created() {
    // 通过 Event Bus 进行组件间通信，来折叠侧边栏
    // bus.$on('collapse', msg => {
    //     this.collapse = msg;
    // })
  },
  props: {
    MenuTreeData: {
      type: Array
    }
  }
};
</script>
<style>
.sidebar-el-menu li:hover {
  background-color: #4169e1;
}
</style>
